NGK Iridium IX Spark Plug Box of 4 (CR9EHIX-9)

NGK Iridium IX spark plugs are a solid choice for upgrading your ignition system, especially if you're looking for improved performance over standard plugs. These are designed with a fine iridium tip, which is known for its durability and ability to provide a consistent spark. This means you can expect better starting, smoother idling, and a more responsive throttle. The iridium alloy has a very high melting point, making it well-suited for the higher temperatures found in many modern engines.

The construction of these plugs includes trivalent metal plating, which helps prevent corrosion and makes them easier to remove later on. The tapered ground electrode is a nice touch that further aids in starting and overall engine performance. If you're looking to get more out of your engine, whether it's a modified setup or just an upgrade from stock, these NGK plugs are a popular option.

This particular plug, the CR9EHIX-9, comes in a box of four, which is convenient for most 4-cylinder applications. They are designed to fit a range of motorcycles, including models like the Honda CBR600F series and the Honda CB600F 599.